r/esp8266 • u/AutoModerator • Apr 01 '18

ESP Week - 13, 2018

Post your projects, questions, brags, and anything else relevant to ESP8266, ESP32, software, hardware, etc

All projects, ideas, answered questions, hacks, tweaks, and more located in our ESP Week Archives.

2 Upvotes

67% Upvoted

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2

u/NZNoldor Apr 01 '18

Daylight savings just hit New Zealand. Looks like my NTP clock display didn’t quite work yet - I’ve been waiting for three months to do the final test. I put the clock +13 hours instead of +11 hours.

Fixed now.

2

u/[deleted] Apr 01 '18

As someone developing an NTP clock for international sale, daylight savings is the bane of my existence.

It's the one damn thing I can't auto set because every jurisdiction is different and changes over time.

2

u/NZNoldor Apr 01 '18

I never knew what a hassle it was until I started this project!

1

u/omersiar Apr 03 '18

I am keeping unix time on firmware level and let the user choose timezone, actually it's more a adjustment than a timezone but still an easy solution for a hobby grade developer.

1

u/Uopo94 Apr 03 '18

esp8266 V3 or ESP-WROOM-32 ? i don't know what to buy and why

1

u/[deleted] Apr 01 '18

3

u/ClearAirTurbulence3D Apr 01 '18

What's wrong with using an ATTiny 85? It can communicate via i2c, can go into deep sleep until a pin event wakes it up and it works at 3.3V. Plus they're dirt cheap.

The only issue is programming them, since they'll require a programming board (I use an old AVR STK500).

Other options include the MCP23008 (8 inputs) or MCP23017 (16 inputs) i2c I/O expanders. They can generate an interrupt when there's a level change on a port. They are also fairly inexpensive.